The "High Voltage Ceramic Insulator Porcelain" is a collectible item used for electrical purposes. Made of porcelain, this insulator is designed to withstand high voltage levels and is commonly used in electrical power distribution systems. It is a unique and durable piece that collectors may find interesting due to its historical and functional significance. Have around 8 of these, some with bolts on end and some without. I have sold two of these with bolts.  I have now 3 with bolts and 3 without bolts.